Pytest conftest

#pytest   #unittest   #python  

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Table of Content

Using conftest.py to share fixtures and hooks among all tests

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autouse

conftest.py

from typing import Iterator
import pytest


@pytest.fixture(autouse=True)
def setup_teardownII() -> Iterator[None]:
    print("run setup fixture before test")
    yield
    print("run tear down fixture after test")

autouse

Set autouse to run this fixture for all tests

test_file.py

def test_with_fixture() -> None:
    print("run test III")
    assert True

run pytest verbose

python -m pytest -s <test file>

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Run tests

python -m pytest -s test_file.py
#
run setup fixture before test
run test III
.run tear down fixture after test

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scope

Fixture scopes

Fixtures are created when first requested by a test, and are destroyed based on their scope:

• function: (default) The fixture is destroy at the end of the test,
• class:
• module:
• package:
• session: The fixture destroy at the end of the last session.

scope demo

conftest.py

from typing import Iterator
import pytest


@pytest.fixture(scope="session", autouse=True)
def setup_teardownII() -> Iterator[None]:
    print("\nrun setup fixture before session start")
    yield
    print("run tear down fixture after session end")

test_file.py

def test_with_fixture() -> None:
    print("run test")
    assert True

def test_with_fixture_II() -> None:
    print("run testII")
    assert True

def test_with_fixtureIII() -> None:
    print("run test III")
    assert True

run

python -m pytest -s tests/test_file.py
#
run setup fixture before session start
run test
.run testII
.run test III
.run tear down fixture after session end